The roads into London were so _____ traffic that even the fire engines couldn’t get through.

The roads into London were so _____ traffic that even the fire engines couldn’t get through.

1. A.
   choked up by
2. B.
   choked up with
3. C.
   choked back by
4. D.
   choked back with

The roads into London were so _____ traffic that even the fire engines couldn’t get through.

A. choked up by                                       B. choked up with    

C. choked back by                                     D. choked back with

The roads into London were so _____ traffic that even the fire engines couldn’t get through.